1. which type of macromolecule stores energy and provides thermal insulation for the body? * a. lipid b. protein c. nucleic acid b. carbohydrate 2. which structural feature of the cell membrane allows molecules such as oxygen and carbon dioxide to diffuse into and out of the cell? * a. the cell membrane contains proteins molecules. b. the cell membrane contains cholesterol molecules. c. the cell membrane is made up of two layers of phospholipids. d. the cell membrane is anchored to the cytoplasm by the cytoskeleton.

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla

Which areas of earth receive the most precipitation on average? a. tropics b. temperate zones c. regions near 30? n and s latitudes d. polar zones 1